Skiving machine



SKIV ING MACHINE 3 Sheets-Sheet l Filed May 9, 1944 nvenors LcslicHBermion 5 WilliamA. Smart April lo, 1945.

L H. BENNION ETAL skIvING MACHINE Filed May 9, 194AY 3 Sheets-Sheei, 2

[n1/en to:

'Leslie HB ennior T/ViZz'amA. Smart By their' Attorn ff aamg PI 10, 1945. L. H. BENNION ETAL SKIVING MACHINE Filed May 9, 1944 Ihnen fors Les/ze A Bef Non Patented Apr. 10, 1945 UiviTiLo.- STATES PATENT' orifice;

v 2,313,159 sKlvlNG MAcnNE Leslie-.Hugh :Bennion: and William-Arnold Smarriti. Leicester,.;England,fassignors to United Shoe Machinery` Corporation, Flemington, N. J., a corporation of New Jersey Application May'-9,f1944,-seria1 No; 534;?54# 'In Great-:Britain April 2a, 1943 14 Claims. (CLR-+63).

This' linvention 'relates to improvements A'in 'or relatingl 'to splittng,--'skiving or Vlike machines and-is particularly, but by 'no 'means' exclusively,` concerned Ndwith machines (such as described` in thel-patent'to W. J l Young',-No. 1,033,366) etilapte'el` fclrskivingodt'or shoe stiifener blanks'during' the manufacture 'of stien'ers foruse in stiening heel end portions of bootscrsh'oes. v*Such neelI end; 'stii'ener's 'are'-'frequentiy also known in the shoe` manufacturing 'industry as counters:

'f-By'wa'yf of eXample;.-'there ls hereinafter de-- scribed-one convenient constructicn'of machine which is 'provided' by the' invention' 'and is illus:- trative thereof; the illustrative'machin'e being an itprdvedstiener skiving machine having ahoiezo'ntal matrix roll, a; horizontal'cooperatln'g feedf r'oll below/'the matrixroll, a horizontal xed knife' arranged along the discharge side of the bite "of said ro1ls,^devicesor pressure ng'e'rs' adapted to press 'af workpiece into a matrixfin' thejinatrix rolland 'powermealns for controlling said devices;-

' Stiifener blanks'for-heel'end portons'of boots4 or shoes are usually cutout-'from sheet' material (e. g., fibrous board material manufactured on paper' making principles) 'to a-'desired'shapeand size v:and the lmargins 4of ythe *blanks are' 'their usually' skivedf to provide 'a' relatively'thn edge aroundeach mblankbefore the-'-blank-is molded to thefdesired'shape;

Machines by 'means '-of Which-stiffen'erblanksformeel-'end portions of boots -or shoes'have fre-lv que'ntly hitherto-been -skived"'conlprise" a xed knife,f1two -:cooperating rolls comprisi-g'--afeed' roll' adapted to feed a blank vto the'knifeand'a cooperatingf'matrix `roll'havin'g"'forme d"in it amatrix 'of lthe 'samesizei as -thefbla'nk 'and 'so formed that, as ablankpassin'g 'between-therolls orffrom-theline o'f feed or bite `-'of thercllsfs pressed into the-matrix and is'fedt'o the'k'nife,"the` knife, fby 1a.' cut` extending from-one fend 'of the blankfto thefotherend'cuts from' the 'plank 'a' portion thereoff-of wedge shaped-crosssection,' extendingallfaround--the'margin of the blankand 4the'blank'lhas thusformed o'n-it a" slved' marginal portionfhaving a relatively'thin edge; and avcenter portion which is not operated upon by the knife.l f

Skivirrg'vmachines so arranged and jadapte'djtto skiveisuch 'stiener blanks'have in someins'tances; t

heretofore arranged, are, not in all instancesfef fective Sini pressing; the blanks-with sufcient'rm-v. nesssintothe rna'i'iriitr.'V @If 'thethickness of ablank has been;` slightly less =than "the depth of the mia-ff trx,- fthe vrange- -o'f movement-"ot the fingers been found finsumcient "to Epress 'such' a blank -r'mlytherein-'`=''in l '1" 'k 1 If the blank, )is not pressed with suflicientrm-'f ness into `the fmatrix; morefespecialiy 4lthe center: portion 'of 'the blankf'the'nknife edge f'a's'it isfpa'ss'-l ing 'out of theblank at thecenterpcrtion'thereor whencpera'tin'g fon' 'the leading. end portio'nbf theA blank-and skivin'g the margin around the leading end portion'ltlfieeof; is in somefin'stances,fespeedany i'flthe plenarias been eut fromtbarmapt to tearthe materialiat the-center'portiom'inste'ad of cutting'@out:cleanlylthereiromvand would `-thus spoil the blank. Hitherto; moreover; 1 whether or notrsuc'h tearinga's referred Eto has -occurredthere has'been a tendency when heel -e'nd 'stifiener blankshave-been-skiv'ed by machines of llecilar--- acterin question' forthe skiving result' obtained' at the- 'leading 'end portion of a' blank vto dller appreciably" from that obtained at th'e'trailin'gl end portion', ,a result which is, undesirable;

l According to one feature .of thejprese'nt 'in'venA vision .of a mechanism comprisingl the pressurev ineera springs for'actua'tingv the 'pressure ngers. and control and adjustment means .forthe'pressure nng'ers all mounted so 'as to "be easily "fremovable from the 'skiidng machine as a unit.

Still another feature of `the'inv'e'ntion vis the provision of mechanism and means in which' 'a clearance may be v'maintaine'c'l 'at 'all .times be-f tween the pressure fingers.v 'and 'thegcontour' of thematrxll;

A further feature is a. simple cam construction b y means of which the pressuref'ingers are prevented' fro'm vinterfering with the introduction of the leadn'gedgepf a'work piece to 'the bite 'be-1 tween'th'eif'eed roll 'and fthe; matrix roll.

These andfother features; ,of 'the'inventiom in-v cludin'g certain details 'of 'construction 'and combinations of parts will be described as embodied in an illustrated machine.

Referring to the accompanying drawings,

Fig. 1 is a sectional elevation of the illustrative machine;

Fig. 2 is a sectional plan view taken just above the pressure n'gfr' which machine is Fig. 4 is a section taken along the line I iI-f--IIY y of Fig. 1;

Fig.- 5 is a plan view of amagazine and blank feeding member; Fig. 6 is a front view of 5; and

Fig. '7 is a sectionalview showing a modifiedj- ,screwfmember 54 arranged tc bear down upon cam control for the pressing fingers. l'

The illustrated machine, having main parts. I

similar to those shown in the machine of the Young Patent; fNo; 1,033,366,`V above mentionedt comprisesamaingframegl in which -is rotatably mounted .a IhorizontaLcylindrical.:matrix 4roll -1 I 2, a horizontal cylindrical ifeedroll I4 arranged below thematrixmoll-.anda horizontal,.xed skiving knife- I 8, positioned=on` the` discharge sideof the bite between the rolls I2 and I4 arranged to -skive a -stiffener blank as it is being-fed. between the rolls. Poweriismpartedto--aycountershaft I (Fig-11)Y byrmeans notshownyand a pinion gear 3 'afixedtheretodrivesai largel gear 5 which in t turnrotatesa ,shaftfj'andfthe-:feed roll YI4 and also' the matrixfroll 1I Znthe latterfbyf-means 0f a gear 9 inqmesh witlra gear 4(not shown) on the shaft of.rol1 I2.- The rolls I2- and. lare arrangedtofbe drivenfinfeppositedireetiws as Shown by the arrows and yat/the .san'ie peripheral gspeed. The feed roll I4. is *urged upwardly toward the matrix T911 bY-mea'n QSPI'IgSf-laf 011.1570118 spring I8 is.shown(Fig. 1) .butlit isA to be understood that-'a spring I8 'is located ateach-end of the feed roll tourgebe'aririg vbl'cl'xs2 and the' feed rollV I4 upwardly' 'in aconventional manner. Each spring I8 rsts upon them'ain" frame I8 and is 'maintained'in place "by mansfof rods 22 which are held. inT 'correct' adjustment by'nieans of nuts 24; Eaennutig'is-heid against rotation by a,

locking,-v device comprising 'fa y'o'ke 26 -adjustabl'y' seeuretrnpon' a pin 12 e ,ity nuts.' 3o, and si.A 'lhej4 matrix rQII'jIZha'sforrned in lit a matrix 9 "4 'which is the Ysini@ sri'pe 'as the 'shape'of a stia; enerblank to be skivefd 'and has""a'center portiony of a .depth corresponding to the'thickne's's of the blank'and a marginalp'ortion extending 'around the matrix which is inclined'from' the bott'omoffv f the matrix tolth'e'z outer cylindrical'face" of the matrix roll- I2, av'fbl'ank is fedlfrom am'agazine feeder'36 andbetween the' r'ollsf'IZ, and I4 to the knife I8, :the blankj isfpressed into thematrix 34 and afmarginalportion" offthe blank which is c alsed'by 'the'nclined portion of. ,'the'matrix` t0 project beyond the 'cylindrical portions of the matrix' roll at each "side' and between the ends" of the matrix is skive'd'ffrpmthe 'blank'by the knife I8,

the parts vseen in'Fig..

lwhich extends rearwardly of said shaft 40 and is positioned in a groove 46 (Fig. l) extending around and formed on the feed roll I4 and a forwardly extending portion 48 which is held down by -a tension spring 50 connected at the upper end `Lto, the finger and at the lower end to a def lpending portion '52 of the bracket 42. Each finger portion 48 isprovided with an adjustable the shaftv 40 thereby constituting a means for A maintaining each supplementary lever and its pressure finger in adjusted relation. As spring 50i-pulls finger portion 48 downwardly the screw member 54 serves to push the supplemental lever 58 ldown against a cam control member or nger controlling cylinder 88. Each supplementary lever. 58 is provided with a contact member 62 to take the pressure between the lever 58 and the control cylinder 60 for an effective and sensitive control. The control cylinder 60 is rotatably mounted bymeans of a shaft 69 in the brackets 'II and -13 held -to the guideways IIO by bolts I5 and IL 'lhe cylinder-88` is parallel to the matrix and ,feed rolls, and is-driven in timed relation .thereto by means of sprockets 84, 86 and chain 6 8 (Fig. 2). The fingers 38 are spaced apart about one-eighth of an inch and the surface-of the feed roll I4 between the fingers is'roughened to assist in feeding the blank to the knife IB.

The fingerY controlling cylinder has formed in it-.a depression 'I8 corresponding substantially tothe shape of the matrix 34 and has a con centric cylindrical portion between the ends of the depression and at each side thereof.

. .Thearrangement is such that when the contact members 62 are in engagement with the cylindrical portions of the control cylinder 60 the work engaging portions of the fingers 38 which are immediately in front of the knife edge are just outofengagement with the cylindrical portions ofthe matrix roll I2y and when any of the members 62are in engagement with the depression 'I8 in theA control cylinder, the work engaging por-y tionsA of those fingers may, if no work is in the machine, .rise into or within the matrix 34 but not into engagement with the bottom of the mato rise until the4 leading edge of the blank has leaving 'the marginal portidnl-of the blank skive'd,

to athfn edge.' The'cente'portion of the blank inl the matrix34'pas'ses' over'the knife I8 and is'not',

@grated upon.

are arranged'to press thefhlnk into'thematrixl 34-v there beingfa number offsuchr'igers the illustrated machine' Whichengag'e the blank and a number of other fingers at 'e'ach side.v theretheicontrolzfcylinder `that the work ,engaging passed betweenxtherolls I2and I4 but are lallowed torise before the vknife cuts out of the blank materialsoftljiatduring this cutting out oi the knife= the blank is held firmly against the matrix' 341 and tearing of the blank is avoided. The flngers 38 are free to be raised by 'their springsl 50 until the .trailing end of the blank is just tov-the knife I8. The action ofthe fingersSBiis then so-modiiied or controlled by portions ofthe fingers are again held -just out ofgengagement withthe cylindrical portion of the matrix roll I2, Thengers at each side of ieeesesamstraat depressies-1:inthe-control cylinder will, of course.- be lheld out-of engagement with lthe matrix roll 2 all the time the blank is being operated upon and also while the rolls are'rotating idly. Each member 62 will followa contour of the cylinder'60 and thus neutralize the action of a spring'Su formodifying the movement'of a linger 38 to follow the matrix roll contour with a clearance being maintained between the pressing surfaceA of the Vfinger and the roll |2.

The springs 50 which -hold the 'forward end portions 48 of the fingers downagainst'the control`cylinder 60 are independentlyadjustableby means of pins 16 and nuts 18 '(Fig'. '1) so that, if desired; some of the fingers such as those which engage the center portion of the blank-maybe urged' against the blank with greater pressure than those which engagev the marginalportion of the blank. While no work is beingp'a'ssed through' the machine it can be easily seen that one finger 38, one supplementary lever- 8 and one -contact member 62 will move-as a'unitx' All the units may be said to constitutea pressure iingermeans.

'The aforesaid bracket-42 on which 'the'iingers 38, supplementary levers 58, 'and springsx 50 a're mounted, may readilybe removed from -the ma chine frame |0 to allow the lingers I38 -to be changed, 'and this bracket` 42 hasrotatably mounted -in `it an veccentric shaft (Figs. ,'1 and 4) which may be rotated bythe'operator to cause the rear end portions 48 of the fingers to be 'raised and their forward end portions to be lowered in their grooves 46 when vit is desired to adjust parts of the machine' which cannot readily' be lseen or reached when they are in operative position.l A U-shaped member 82 :(Figsf-l, 4) is vertically slidable within theframe membe'r 42 :,(a'nd by cam action of the-shaft 80) is arranged to slide upwardly and bear against the bottom edges `of the 'finger portions 48. as well as the 'supplementary levers 58 to lift them. A

The control cylinder 60 may have a smooth cylindrical outer surface, as shownin Fig. l', or it may be preferred to use a modified control cylinder 90 such as shown in Figi *I on which is` provided a projecting portion 92 arranged just in front, considered inthe4 direction of rotation of the roll', of the depression 94. Such an arrangement will cause the fingers 38 to be depressed away from the matrix roll |2 just as the leading edge of the blank is about to enter the bite of the rolls so that the fingers 38 will not possibly interfere with the entry of the blank between the rolls.

It is to be understood that the machine may be provided with any one of various types of conventional magazine feeders by means of which a stack of blanks may be conveniently held on a platform 96 of the machine and by means of which the bottom blank may be fed to the bite of the rolls I2 and I4 in timed relation to their rotation. Figs. 1, 5 and 6 show such a feeding mechanism having space for a stack of blanks 98 to be retained by spring arms |00, |02. A reciprocating feed member |04 is arranged to feed the bottom blank in the stack to the bite of the rolls I2 and |4, this feed member |04 being operated in proper timed relation to the rotation of the rolls by means not shown.

The work engaging portions of the fingers 38 may be adjusted horizontally toward or away from the knife edge and the bite of the rolls |2 and 4 by means of adjustment screw members |06 (Fig. 2.) freely mounted in bosses |08 integral with side members 43 and 45 fastened by screws as shown to the frame 42. Screw-members lll may be turned in or out from the guideways H0 attached to the machine frame by bolts 44 and 4B.

We have found that the skived end portions of a stiffener blank which has been skived in a machine having fingers controlled in the manner hereinbefore described are appreciably more uniform than end portions of blanks which have been skived in machines heretofore constructed. It will be realizedxthat, in a completed stiffener it is desirable that the end portions shall be at least substantially uniform, otherwise a boot or shoe in which such a completed stifieneris incorporated may -not be of uniform appearance ateach Aside of the heel end portion of the boot or shoe or non. uniform end portions may 'interfere somewhat -with the proper molding of the stiffe'ner.'

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described having, in combination, a knife, a feed roll and a matrixrollfor feeding a blank between them to the knife; `a series of pressure fingers pivotally mounted on Aan axis for pressing the blank toward the matrix roll at the line of feed, yielding `means to provide the said pressure, a supplementary lever for "each pressure finger, meansfor maintaining each supplementary lever in adjusted relation to the corresponding pressure finger, and means to neutralize the' said vpressure through the supple;- mentary levers.

2. A machine 0f theclass' described having, in combination-a knife, a feed roll and a matrix roll for feeding a blank between them Vto the'knife, a series of pressure fingers for pressing the 'blank toward the matrix roll at the-line of feed, yielding means to provide the said pressure, and a io-' tatable control cylinder with adepression corresponding to the matrix of the matrix roll, said control cylinder being rotatable with the feed roll and operably arranged to neutralize the said presf sure in accordance with the'contour of the control cylinder and depression.

3. A machine of the class dezc'ribed havingin combination, a knife, a pair of cooperating rolls for feeding blanks to said knife, mechanism iz1| cludin'g a series of fingers for pressingfablank toward one of said rolls, andmeans for operating said fingers to effect the 'pressure in timed rela' tion with the feeding of the blank, said mechanism being removably mounted as a unit on the machine frame.

4. A machine of the class described having, in combination, a knife, a pair of cooperating rolls for feeding blanks to sad knife, mechanism including a series of fingers for pressing a blank toward one of said rolls, arid means for operating said fingers to effect the pressure in timed relation with the feeding of the blank, said mechanism being adjustable toward and from the bite of the rolls on the machine frame.

5. A machine of the class described having a main frame, a knife fixed to said frame, a pair of cooperating rolls for feeding blanks to said knife, means for feeding individual blanks to said rolls, mechanism including a series of fingers for pressing a blakxtoward one of said rolls, and means for operating said fingers to effect the pressure in timed Yrelation with the feeding of the blank, said series of fingers being mounted on a bracket slidable with relation to said frame and adapted to be fixed thereto.

6. A machine such as set forth in claim 3, the

said mechanism also including a supplementary lever for each pressure iinger, means for maintaining each supplementary lever in adjusted relation to the corresponding pressure nger, and means for operating the fingers comprising a cam member rotatable with one of the cooperating rolls for modifying the action of the' lingers through the supplementary levers.

8. A machine of the class described having,Y

ln combination, a matrix roll, a cooperating roll, a knife arranged along the discharge side of the bite `of said rolls, pressure fingers operating in grooves of said cooperating roll, yielding means tending to move the fingers toward the matrix roll, a control cam member mounted for rotation with the said cooperating roll, and means for limiting the motion of the ngers toward the matrix roll, said limiting means 'being in contact with the control cam member.

9. A machine of the class described having a main frame, a matrix roll, a cooperating roll, a knife arranged along the discharge side of the bite of said rolls, pressure nger means operating in grooves of said cooperating roll. yielding means tending to move the nger means toward the matrix roll, and cam means mounted for operation in timed relation with the operation of the matrix roll for maintaining a clearance between the nger means and the matrix roll contour.

10. A machine of the class described having, in combination, a matrix roll, a cooperating roll, a knife arranged along thedischarge side of the bite of said rolls, pressure iinger means for pressing a blank toward the matrix roll, yielding means to provide the said pressure, and power means for maintaining a clearance between the linger means and the matrix roll contour, said power means being provided with cam means for momentarily moving the finger means from the path of a moving blank to facilitate the entrance of the leading end of said blank.

11.y A machine' of the class described having a main frame, a matrix roll and a cooperating roll on said main frame, a knife arranged along the discharge side of the bite of said rolls, a magazine feeder for feeding individual blanks to said bite, pressure fingers pivoted on an axis for pressing a blank, while being fed, toward the matrix roll, yielding means to provide the said pressure, a supplementary lever for each pressure nger rotatable therewith on thesame axis, means for maintaining each supplementary lever in adjusted relation to the corresponding pressure finger, and a control cylinder having a depression corresponding to the matrix of the matrix roll'and being rotatable with said cooperating roll and in timed relation with the rotation of the matrix roll, said supplementary levers being in contact with said control cylinder whereby the range of action of the pressure fingers may be modied by the control cylinder contour.

Y12. A machine of the class described having, in combination, a knife, a feed roll and a matrix roll for feeding a blank between them to the knife, 1a Vseries lof vpressure fingers for pressing the blank toward the matrix roll approximately at the -line of'feed, yielding means to provide the said'pressure, and means for maintaining a clearance between each pressure linger and the matrix roll, the rangeof operation of each pressure finger extending. withn `the matrix of the matrix roll.`

:13.` A. machine .of the class described having, in .combination`,a knife, a feed roll and a matrix roll. for feeding/a blank between them to the knife, a-series f-ofpressure iingersfor pressing the-blank toward the.` matrix roll approximately at the of feed, adjustable yielding means to provide the s aidpressure, and means for maintaining a. clearance between the pressure lingers and the matrix roll, the range of operation of some of the pressure iingers extending within the matrix of the matrix roll.

14. A-machne as described in claim 13, the

' means for maintaining a clearance being adj'ustableexte'rlor to the machine. 

